/*
 * Copyright � 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Runtime.Serialization;
using Spring.Core.TypeResolution;
using Spring.Expressions.Parser.antlr.collections;

namespace Spring.Expressions;

/// <summary>
/// Represents parsed type node in the navigation expression.
/// </summary>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class TypeNode : BaseNode
{
    private Type type;

    /// <summary>
    /// Create a new instance
    /// </summary>
    public TypeNode()
        : base()
    {
    }

    /// <summary>
    /// Create a new instance from SerializationInfo
    /// </summary>
    protected TypeNode(SerializationInfo info, StreamingContext context)
        : base(info, context)
    {
    }

    /// <summary>
    /// Returns node's value for the given context.
    /// </summary>
    /// <param name="context">Context to evaluate expressions against.</param>
    /// <param name="evalContext">Current expression evaluation context.</param>
    /// <returns>Node's value.</returns>
    protected override object Get(object context, EvaluationContext evalContext)
    {
        if (type == null)
        {
            lock (this)
            {
                type = TypeResolutionUtils.ResolveType(getText());
            }
        }

        return type;
    }

    /// <summary>
    /// Overrides getText to allow easy way to get fully
    /// qualified typename.
    /// </summary>
    /// <returns>
    /// Fully qualified typename as a string.
    /// </returns>
    public override string getText()
    {
        string tmp = base.getText();
//            if (tmp != null && TypeRegistry.ContainsAlias(tmp))
//            {
//                Type type = TypeRegistry.ResolveType(tmp);
//                if (type != null)
//                {
//                    tmp = type.AssemblyQualifiedName;
//                }
//            }
        AST node = this.getFirstChild();
        while (node != null)
        {
            tmp += node.getText();
            node = node.getNextSibling();
        }

        return tmp;
    }
}
